Courtney Taylor, a 26-year-old African American man from Chicago, was killed on January 23, 2016, in the lobby of the Hyatt Regency McCormick Place Hotel while attending a function. Witnesses say Taylor tried to break up a fight when one of the men involved produced a gun and shot him in the head; he was pronounced dead at the scene.

Investigators arrested two men in connection with the killing. Armonte Hooper, 23, was charged with first-degree murder on January 31, 2016, accused of being the shooter. James Briscoe, also 23, was taken into custody in early February 2016 and charged with first-degree murder. Both were held without bond and pleaded not guilty. Prosecutors say the confrontation began over a dispute about a woman and that Briscoe and Hooper went to the hotel to confront Taylor; witnesses and scene evidence formed the basis of the charges.

Did anyone attending the event or working at the Hyatt see the confrontation or the people involved?